U.S. patent application number 11/677625 was filed with the patent office on 2008-08-21 for liquid crystal display device and method of driving the same.
Invention is credited to Tae-Sung Kim.
Application Number | 20080198116 11/677625 |
Document ID | / |
Family ID | 38681141 |
Filed Date | 2008-08-21 |
United States Patent
Application |
20080198116 |
Kind Code |
A1 |
Kim; Tae-Sung |
August 21, 2008 |
LIQUID CRYSTAL DISPLAY DEVICE AND METHOD OF DRIVING THE SAME
Abstract
A liquid crystal display device includes a timing controller, a
data driver, a gate driver and a liquid crystal panel. The timing
controller receives an image data signal to output a first control
signal, a second control signal and a data signal corresponding to
the image data signal. The data driver outputs first and second
gray scale signals having different gray scale levels in response
to the first control signal and the data signal. The gate driver
outputs a gate signal in response to the second control signal. The
liquid crystal panel includes a plurality of pixels aligned in a
matrix and displays an image in response to the first gray scale
signal, the second gray scale signal and the gate signal. Each of
the pixels of the liquid crystal panel includes a first sub-pixel,
to which the first and second gray scale signals are alternately
applied in one frame unit, and a second sub-pixel, to which the
first gray scale signal is applied.
Inventors: |
Kim; Tae-Sung; (Suwon-si,
KR) |
Correspondence
Address: |
F. CHAU & ASSOCIATES, LLC
130 WOODBURY ROAD
WOODBURY
NY
11797
US
|
Family ID: |
38681141 |
Appl. No.: |
11/677625 |
Filed: |
April 6, 2007 |
Current U.S.
Class: |
345/89 |
Current CPC
Class: |
G09G 3/3648 20130101;
G09G 2320/0261 20130101; G09G 2320/0271 20130101; G09G 3/2074
20130101; G09G 2310/0205 20130101 |
Class at
Publication: |
345/89 |
International
Class: |
G09G 3/36 20060101
G09G003/36 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 7, 2006 |
KR |
10-2006-31940 |
Claims
1. A liquid crystal display device comprising: a timing controller
receiving an image data signal to output a first control signal a
second control signal and a data signal corresponding to the image
data signal; a data driver outputting first and second gray scale
signals having different gray scale levels in response to the first
control signal and the data signal; a gate driver outputting a gate
signal in response to the second control signal; and a liquid
crystal panel including a plurality of pixels aligned in a matrix
and displaying an image in response to the first gray scale signal,
the second gray scale signal and the gate signal, wherein each of
the pixels comprises; a first sub-pixel to which the first and
second gray scale signals are alternately applied in one frame
unit; and a second sub-pixel to which the first gray scale signal
is applied.
2. The liquid crystal display device of claim 1, further comprising
a gray scale voltage generator outputting a first gamma reference
voltage having a first gamma value and a second gamma reference
voltage having a second gamma value different from the first gamma
value, wherein the data driver determines a gray scale level of the
first and second gray scale signals in response to the first and
second gamma reference voltages.
3. The liquid crystal display device of claim 2, wherein a gray
scale level of the first gray scale signal is smaller than that of
the second data gray scale signal.
4. The liquid crystal display device of claim 3, wherein a polarity
of the first and second gray scale signals is the same, and wherein
the polarity of the first and second gray scale signals is inverted
in every two frames of the image data signal.
5. The liquid crystal display device of claim 1, wherein the gate
signal comprises: a first gate signal used to determine when to
apply the first and second gray scale signals to the first
sub-pixel; and a second gate signal used to determine when to apply
the first gray scale signal to the second sub-pixel.
6. The liquid crystal display device of claim 5, wherein the gate
driver comprises: a controller outputting a frame control signal
corresponding to the frames of the image data signal in response to
the second control signal; a first gate signal generator outputting
an activated first gate signal for every frame of the image data
signal in response to the frame control signal; and a second gate
signal generator outputting an activated second gate signal for
every two frames of the image data signal in response to the frame
control signal.
7. The liquid crystal display device of claim 6, wherein each of
the pixels further comprises: a data line transmitting the first
and second gray scale signals from the data driver; a first gate
line transmitting the first gate signal of the first gate signal
generator to the first sub-pixel in one frame unit; and a second
gate line transmitting the second gate signal of the second gate
signal generator to the second sub-pixel in every two frames.
8. The liquid crystal display device of claim 1, wherein the gate
driver comprises a gate signal generator outputting the gate signal
in response to the second control signal.
9. The liquid crystal display device of claim 8, wherein each of
the pixels further comprises: a data line transmitting the first
and second gray scale signals from the data driver: a first gate
line receiving the gate signal in one frame unit to transmit the
gate signal to the first sub-pixel; and a second gate line
receiving the gate signal in every two frames to transmit the gate
signal to the second sub-pixel.
10. The liquid crystal display device of claim 8, further
comprising a gate signal switching circuit supplying the gate
signal to the first gate lines in one frame unit and supplying the
gate signal to the second gate lines in every two frames.
11. The liquid crystal display device of claim 1, wherein the image
data signal has a frequency of about 120 Hz or about 60 Hz.
12. A method of driving a liquid crystal display device, the method
comprising: receiving an image data signal to output a first
control signal a second control signal and a data signal
corresponding to the image data signal; outputting a first gray
scale signal in response to the first control signal and the data
signal in one frame unit; outputting a second gray scale having a
gray scale level different from that of the first gray scale signal
in response to the first control signal and the data signal in
every two frames; outputting a first gate signal activated for
every frame of the image data signal and outputting a second gate
signal activated for every two frames of the image data signal in
response to the second control signal; and displaying an image in
response to the first gray scale signal, the second gray scale
signal and the gate signal.
13. The method of claim 12, wherein the outputting of the first and
second gate signals comprises: outputting a frame control signal
corresponding to frames of the image data signal in response to the
second control signal; and outputting the first and second gate
signals in response to the frame control signal.
14. The method of claim 12, wherein a polarity of the first and
second gray scale signals is the same, and wherein the polarity of
the first and second gray scale signals is inversed in every two
frames of the image data signal.
15. The method of claim 121 wherein a gray scale level of the first
gray scale signal is smaller than that of the second gray scale
signal.
Description
CROSS-REFERENCE TO RELATED PATENT APPLICATION
[0001] This application claims priority to Korean Patent
Application No. 2006-31940, filed on Apr. 7, 2006, the contents of
which are herein incorporated by reference in its entirety.
BACKGROUND OF THE INVENTION
[0002] 1. Technical Field
[0003] The present disclosure relates to a display device and, more
particularly, to a liquid crystal display device capable of
improving the display quality thereof and a method of driving the
liquid crystal display device.
[0004] 2. Discussion of Related Art
[0005] A liquid crystal display device includes two substrates
coupled with each other while forming a predetermined space
therebetween, and a liquid crystal layer interposed between the two
substrates. The liquid crystal display device applies an electric
field to the liquid crystal layer that aligns the liquid crystal
molecules of the liquid crystal layer to control the polarization
of incident light, thereby displaying images.
[0006] In liquid crystal display devices employing a large-sized
liquid crystal panel, the image may exhibit some distortion
depending on the viewing angle, and the picture quality may be
degraded. In addition, the contour of the image may be blurred when
the liquid crystal display device displays moving pictures.
SUMMARY OF THE INVENTION
[0007] In an exemplary embodiment of the present invention, a
liquid crystal display device includes a timing controller, a data
driver, a gate driver and a liquid crystal panel. The timing
controller receives an external image data signal to output a first
control signal a second control signal and a data signal
corresponding to the image data signal. The data driver outputs
first and second gray scale signals having different gray scale
levels in response to the first control signal and the data signal.
The gate driver outputs a gate signal in response to the second
control signal. The liquid crystal panel includes a plurality of
pixels aligned in a matrix and displays an image in response to the
first gray scale signal, the second gray scale signal and the gate
signal
[0008] Each of the pixels of the liquid crystal panel, according to
an exemplary embodiment of the present invention, includes a first
sub-pixel and a second sub-pixel. The first and second gray scale
signals are alternately applied to the first sub-pixel from the
data driver corresponding to frames of the image data signal. The
first gray scale signal is applied to the second sub-pixel from the
data driver.
[0009] In an exemplary embodiment of the present invention, a
method of driving a liquid crystal display device is provided. The
method includes: receiving an image data signal to output a first
control signal, a second control signal and a data signal
corresponding to the image data signal; outputting a first gray
scale signal in response to the first control signal and the data
signal in one frame unit, outputting a second gray scale having a
gray scale level different from that of the first gray scale signal
in response to the first control signal and the data signal in
every two frames, outputting a first gate signal activated for
every frame of the image data signal and outputting a second gate
signal activated for every two frames of the image data signal in
response to the second control signal; displaying an image in
response to the first gray scale signal, the second gray scale
signal and the gate signal,
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The present invention will become readily apparent to those
of ordinary skill in the art when descriptions of exemplary
embodiments thereof are read with reference to the accompanying
drawings.
[0011] FIG. 1 is a block diagram showing a liquid crystal display
device according to an exemplary embodiment the present
invention.
[0012] FIGS. 2A and 2B are views showing a pixel of the liquid
crystal panel shown in FIG. 1, according to an exemplary embodiment
of the present invention.
[0013] FIG. 3 is a block diagram showing the gate driver 500 of
FIG. 1, according to an exemplary embodiment of the present
invention.
[0014] FIGS. 4A and 4B are timing diagrams showing driving signals
in connection with FIGS. 2A and 2B.
[0015] FIG. 5 is a view showing images displayed on a liquid
crystal panel according to an exemplary embodiment of the present
invention.
[0016] FIG. 6 is a block diagram of a liquid crystal display device
according to an exemplary embodiment of the present invention.
DESCRIPTION OF EXEMPLARY EMBODIMENTS
[0017] Hereinafter, exemplary embodiments of the present invention
will be described in detail with reference to the accompanying
drawings.
[0018] In an exemplary embodiment of the present invention, a
liquid crystal display device employs a vertical alignment mode of
liquid crystal and may improve side visibility. In the vertical
alignment mode, liquid crystal molecules are vertically distributed
when the electric field is not applied to the liquid crystal layer.
The liquid crystal molecules are aligned perpendicularly with
respect to the electric field when the voltage is applied to the
liquid crystal layer. For example, a super-patterned vertical
alignment (S-PVA) mode divides a pixel into two sub-pixels wherein
the charging rate of a first liquid crystal capacitor for the first
sub-pixel is different from the charging rate of a second liquid
crystal capacitor for the second sub-pixel. According to an
exemplary embodiment of the present invention, a liquid crystal
display device includes an S-PVA mode and the difference in charge
rate for the first and second sub-pixels results in a transmittance
difference, and the side visibility of the liquid crystal display
device may be improved.
[0019] FIG. 1 is a block diagram showing a liquid crystal display
device according to an exemplary embodiment the present
invention.
[0020] Referring to FIG. 1 the liquid crystal display device 10
includes a liquid crystal panel 100 displaying images, a timing
controller 200 outputting control signals, a gray scale voltage
generator 300 outputting gray scale voltage signals, a data driver
400 outputting gray scale signals, and a gate driver 500 outputting
gate driving signals.
[0021] The liquid crystal panel 100 includes a first substrate
having a common electrode and a second substrate having pixel
electrodes. A liquid crystal is interposed between the first and
second substrates. The second substrate having the pixel electrodes
includes a plurality of data lines D1-Dm, a plurality of gate lines
G1a-Gnb, and a plurality of pixels PX aligned in the is form of a
matrix and electrically connected to the data and gate lines D1-Dn
and G1a-Gnb.
[0022] Each of the pixels PX includes a first sub-pixel PXa and a
second sub-pixel PXb, which are electrically connected to a data
line D1 and two gate lines G1a and G1b. The data lines D1-Dm may be
aligned in a column direction of the liquid crystal panel 100 and
may be substantially parallel to each other, and the gate lines
G1-Cn may be aligned in a row direction of the liquid crystal panel
100 and may be substantially parallel to each other.
[0023] The timing controller 200 receives image data signals RGB a
horizontal synchronous signal Hsync, a vertical synchronous signal
Vsync, a data enable signal DE and a clock signal MCLK, for
example, from an external source (not shown).
[0024] The timing controller 200 outputs a data signal DATA having
the data format converted to be suitable for the standard of the
liquid crystal panel 10O, and first and second control signals CNT1
and CNT2. The data signal DATA and the first control signal ONT1
are applied to the data driver 400, and the second control signal
CNT2 is applied to the gate driver 500. The image data signals RGB
applied to the timing controller 200 may have a frequency of about
60 Hz or about 120 Hz.
[0025] The gray scale voltage generator 300 outputs first and
second gray scale voltage signals GV1 and GV2 related to the
transmittance of the pixel PX in the liquid crystal panel 100. The
first and second gray scale voltage signals GV1 and GV2 are applied
to the data driver 400. In an exemplary embodiment of the present
invention, the level of the first gray scale voltage signal GV1 is
different from that of the second gray scale voltage signal
GV2.
[0026] The data driver 400 outputs the first and second gray scale
signals GA1 and GAS through the data lines D1-Dm of the liquid
crystal panel 100 in response to the data signal DATA and first
control signal CNT1, which are provided from the timing controller
200, and the first and second gray scale voltage signals GV1 and
GV2, which are provided from the gray scale voltage generator
300.
[0027] The data driver 400 receives the data signal DATA related to
one pixel row from the timing controller 200 and selects a gray
scale voltage signal corresponding to the data signal DATA from the
first and second gray scale voltage signals GV1 and GV2, which are
provided from the gray scale voltage generator 300.
[0028] The data driver 400 converts the selected gray scale voltage
signal into the first gray scale signal GA1 or the second gray
scale signal GA2, which is an analog signal, and transmits the
first gray scale signal GA1 or the second gray scale signal GA2 to
the data lines D1-Dm.
[0029] In an exemplary embodiment of the present invention, the
level of the first gray scale signal GA1 is different from that of
the second gray scale signal GA2. For instance, when the level of
the first gray scale signal GA1 is lower than that of the second
gray scale signal GA2 a dark image may be displayed as the first
gray scale signal GA1 is applied to the pixel PX of the liquid
crystal air panel 100, and a bright image may be displayed as the
second gray scale signal GA2 is applied to the pixel PX.
[0030] The first gray scale signal GA1 is applied to the first and
second sub-pixels PXa and PXb of the liquid crystal panel 100, and
the second gray scale signal GA2 is applied only to the first
sub-pixel PXa of the liquid crystal panel 100. For instance, when
the image data signal RGB is applied to the liquid crystal display
device 10 during one frame period, the first gray scale signal GA1
is substantially simultaneously applied to the first and second
sub-pixels PXa and PXb. The second gray scale signal GA2 is applied
to the first sub-pixel PXa during the next one frame period. At
this time, the first gray scale signal GA1, which has been applied
to the first and second sub-pixels PXa and PXb, is maintained in
the second sub-pixel PXb.
[0031] The gate driver 500 outputs the gate signals GS1a-GSnb
through the gate lines GS1a-GSnb of the liquid crystal panel 100 in
response to the second control signal CNT2 provided from the
controller 200.
[0032] The gate signals GS1a-GSnb are applied to first and second
sub-pixels PXa and PXb, respectively, turning on/off a thin film
transistor corresponding to the first and second sub-pixels PXa and
PXb. That is, the gate signals GS1a-GSnb determine when the first
and second gray scale signals GA1 and GA2, which are output from
the data driver 400, are applied to the first and second sub-pixels
PXa and PXb.
[0033] FIGS. 2A and 2B are views showing a pixel of the liquid
crystal panel shown in FIG. 1, according to an exemplary embodiment
of the present invention.
[0034] Referring to FIGS. 2A and 2B, each pixel PX includes first
and second sub-pixels PXa and PXb, which are surrounded by one data
line D1 and two gate lines G1a and G1b. The first sub-pixel PXa is
connected to both the first data line D1 and the first gate line
G1a, and the second sub-pixel PXb is connected to both the first
data line D1 and the second gate line G1b.
[0035] FIG. 2A shows the gray scale signal applied to one pixel PX
during one frame period of the image data signal RGB, which is
applied to the liquid crystal display device 10, for example, from
an external source. During one frame period of the image data
signal RGB, the first gray scale signal GA1 is applied to the first
and second sub-pixels PXa and PXb.
[0036] For example, when the activated first and second gate
signals GS1a and GS1b are simultaneously input through the first
and second gate lines G1a and G1b, the first and second sub-pixels
PXa and PXb are substantially simultaneously turned on. Thus, the
first gray scale signal GA1, which is provided from the data driver
400 through the first data line D1, is substantially simultaneously
applied to the first and second sub-pixels PXa and PXb.
[0037] FIG. 2B shows the gray scale signal applied to one pixel PX
after one frame period shown in FIG, 2A, that is, during the next
frame period of the image data signal RGB. In the next frame period
of the image data signal RGB, the second gray scale signal GA2 is
applied to the first sub-pixel PXa, and the first gray scale signal
GA1 as shown in FIG. 2A, is maintained in the second sub-pixel
PXb.
[0038] For example, the activated first gate signal GS1a is input
through the first gate line G1a, and the first sub-pixel PXa is
turned on, and the second gate signal GS1b, which is input through
the second gate line G1b, is not changed and the second sub-pixel
PXb maintains a turn-off state.
[0039] Accordingly, the second gray scale signal GA2, which has
been provided from the data driver 400 through the first data line
D1, is applied only to the first sub-pixel PXa, At this time, the
first gray scale signal GA1, which has been applied during the
previous frame period is maintained in the second sub-pixel
PXb.
[0040] FIG. 3 is a block diagram showing the gate driver 500 of
FIG. 1, according to an exemplary embodiment of the present
invention.
[0041] Referring to FIG. 3, the gate driver 500 includes a
controller 510 outputting frame control signals FC, a first gate
signal generator 520 outputting first gate signals GS1a-GSna, and a
second gate signal generator 530 outputting second gate signals
GS1b-GSnb.
[0042] The controller 510 outputs the frame control signal FC,
which corresponds to frames of the image data signal RGB, in
response to the second control signal CNT2 output from the timing
controller 200.
[0043] The first gate signal generator 520 outputs first gate
signals GS1a to GSna, which are activated corresponding to each
frame of the image data signal RGB, in response to the frame
control signal FC, which is provided from the controller 510.
[0044] The second gate signal generator 530 outputs second gate
signals GS1b-GSnb, which are activated corresponding to every two
frames of the image data signal RGB, in response to the frame
control signal FC, which is provided from the controller 510.
[0045] The first gate signals GS1a-GSna of the first gate signal
generator 520 and the second gate signals GS1b-GSnb of the second
gate signal generator 530 are applied to first and second
sub-pixels PXa and PXb of the liquid crystal panel 100,
respectively, thereby turning on/off the first and second
sub-pixels PXa and PXb, respectively.
[0046] FIGS. 4A and 4B are timing diagrams showing driving signals
in connection with FIGS. 2A and 2B.
[0047] Referring to FIG. 4A, the first gray scale signal GA1, which
is provided from the data driver 400 through the first data line
D1, has a predetermined level (a) and polarity thereof which is
periodically changed.
[0048] If the activated first gate signal GS1a and the second gate
signal GS1b are simultaneously input from the gate driver 500
through the first and second gate lines G1a and G1b, the first and
second sub-pixels PXa and PXb are substantially simultaneously
turned on. Accordingly, the first and second sub-pixels PXa and PXb
are substantially simultaneously charged with the first gray scale
signal GA1 having a negative polarity.
[0049] The gate signals GS1a-GSnb, which have been output from the
gate driver 500, are sequentially activated corresponding to the
pixels PX aligned in the column direction of the liquid crystal
panel 100, thereby sequentially turning on the pixels PX.
[0050] Accordingly, the first and second sub-pixels PXa and PXb of
the liquid crystal panel 100 are simultaneously charged with the
first gray scale signal GA1 during one frame period of the image
data signal RGB.
[0051] Referring to FIG. 4B, the second gray scale signal GA2,
which is provided from the data driver 400 through the first data
line D1, has a predetermined level (b) and the polarity thereof is
periodically changed. In an exemplary embodiment of the present
invention, the predetermined level (b) of the second gray scale
signal GA2 is greater than the predetermined level (a) of the first
gray scale signal GA1.
[0052] When the activated first gate signal GS1a is input from the
gate driver 500 through the first gate line G1a the first sub-pixel
PXa is turned on. When the second gate signal GS1b, which is not
changed, is input from the gate driver 500 through the second gate
line G1b, the second sub-pixel PXb is maintained in the turn-off
state.
[0053] Thus, the first sub-pixel PXa is charged with the second
gray scale signal GA2 having a negative polarity, and the first
gray scale signal GA1 having the negative polarity, which has been
charged during the previous frame, is maintained in the second
sub-pixel PXb.
[0054] The first gate signals GS1a to GSna, which have been output
from the gate driver 500, are sequentially activated in the column
direction of the liquid crystal panel 100, thereby sequentially
turning on the first pixels PXa, which air are aligned in the
column direction of the liquid crystal panel 100.
[0055] In an exemplary embodiment of the present invention, the
first sub-pixels PXa of the liquid crystal panel 100 are charged
with the second gray scale signal GA2 during one frame period of
the image data signal RGB, and the first gray scale signal GA1,
which has been charged during the previous frame, is maintained in
the second sub-pixels PXb.
[0056] Referring to FIGS. 4A and 48, the polarity of the first gray
scale signal GA1, which is applied to the first sub-pixel PXa
during one frame period of the image data signal RGB, is
substantially identical to that of the second gray scale signal GA2
which is applied to the first sub-pixel PXa during the next frame
period.
[0057] When the frame of the image data signal RGB is converted,
the first gray scale signal GA1 charged in the first sub-pixel PXa
is rarely converted into the second gray scale signal 0A2 and the
charging time for the first sub-pixel PXa is sufficiently
ensured.
[0058] In an exemplary embodiment of the present invention, the
pixels PX of the liquid crystal panel 100 are charged with the
first gray scale signal GA1 having a low gray scale level (a)
during one frame period of the image data signal RGB, and the
impulsive driving effect which allows a dark image to be displayed
between normal images can be achieved when the liquid crystal
display device 10 displays a moving picture, and the blurring
phenomenon causing the contour of the image to be unclear or
blurred may be prevented.
[0059] FIG. 5 is a view showing images displayed on the liquid
crystal panel 100 of FIG. 1, according to an exemplary embodiment
of the present invention.
[0060] Referring to FIG. 5, the first and second sub-pixels PXa and
PXb are charged with first gray scale signals GA1 having low gray
scale levels (a), respectively, during one frame period of the
image data signal RGB, and a dark image may be displayed on the
liquid crystal panel 100.
[0061] Meanwhile, the first sub-pixel PXa of the liquid crystal
panel 100 is charged with the second gray scale signal GA2 having a
high gray scale level (a) during the next frame period of the image
data signal RGB. At this time, the first gray scale signal GA1
applied during the previous frame period is maintained in the
second sub-pixel PXb of the liquid crystal panel 100, and a bright
image may be displayed on the liquid crystal panel 100.
[0062] The liquid crystal panel 100 may repeatedly display the dark
image and the bright image for every two frames of the image data
signal RGB.
[0063] According to an exemplary embodiment of the present
invention, each pixel of the liquid crystal panel 100 is divided
into two sub-pixels. The gray scale signal having a low gray scale
level is substantially simultaneously applied to the two sub-pixels
during one frame period of the image data signal.
[0064] During the next frame period, the gray scale signal having
the low gray scale level applied in the previous frame period is
maintained in the first sub-pixel, and the second sub-pixel is
charged with the gray scale signal having a high gray scale
level.
[0065] FIG. 6 is a block diagram of a liquid crystal display device
according to an exemplary embodiment of the present invention. In
FIG. 6, the same reference numerals denote the same elements as in
FIG. 1, and further descriptions of these elements will be omitted
in the interests of brevity.
[0066] Referring to FIG. 6, the liquid crystal display device 20
includes a liquid crystal panel 100 comprising a plurality of data
lines D1.about.Dm, a plurality of gate lines G1a.about.Gnb and a
plurality of pixels PX. Each of the pixels PX includes a first sub
pixel PXa and a second sub pixel PXb. Odd gate lines G1a.about.Gna
of the gate lines G1a.about.Gnb are electrically connected to the
first sub pixels PAa, and even gate lines G1b.about.Gnb of the gate
lines G1a.about.Gnb are electrically connected to the second sub
pixels PXb.
[0067] The liquid crystal display device 20 includes a gate driver
600 and a switching circuit 700. The gate driver 600 outputs a
plurality of gate signals GS1.about.GSn. The switching circuit 700
receives the gate signals GS1.about.GSn from the gate driver
600.
[0068] The switching circuit 700 outputs the gate signal
GS1.about.GSn to the odd gate lines G1a.about.Gna in one frame
unit. The gate signal GS1.about.GSn are applied to the first sub
pixels PXa through the odd gate lines G1a.about.Gna, thereby
turning on/off a thin film transistor constituting each of the
first sub pixels PXa.
[0069] Also, the switching circuit 700 outputs the gate signal
GS1.about.GSn to the even gate lines G1b.about.Gnb in every two
frames. The gate signal GS1.about.GSn are applied to the second sub
pixels PXb through the even gate lines G1b.about.Gnb, thereby
turning on/off a thin film transistor constituting each of the
second sub pixels PXb.
[0070] In an exemplary embodiment of the present invention, the
switching circuit 700 may include switching elements (not shown)
disposed between the gate driver 600 and the even gate lines
G1b.about.Cnb. The switching elements provide the gate signals
GS1.about.GSn to the even gate lines G1b.about.Gnb in response to a
selecting signal (not shown) having a high period in every two
frames. That is, the switching circuit 700 may determine a point of
time to drive the second sub pixels PXb in response to the
selecting signal.
[0071] In an exemplary embodiment of the present invention, a side
visibility of the liquid crystal panel can be improved and the
blurring phenomenon can be removed, and the liquid crystal display
device may have improved display quality.
[0072] Although exemplary embodiments of the present invention have
been described in detail with reference to the accompanying
drawings for the purpose of illustration, it is to be understood
that the inventive processes and apparatus should not be construed
as limited thereby. It will be apparent to those of ordinary skill
in the art that various modifications to the foregoing exemplary
embodiments can be made without departing from the scope of the
invention as defined by the appended claims, with equivalents of
the claims to be included therein.
* * * * *